Swapping logic boards is an excellent idea. Once I accomplish this, I'll let you know the results. Unity, I agree that it would be odd for the color adjustment to be altered spontaneously, especially on two separate CCs, though I guess this is worth a shot, if all else fails.
On a completely different topic (which maybe should be posted separately), have you guys tried and had any major issues with using a 575 board for the Mystic upgrade? Thinking of buying a third CC to complete the trilogy. If I proceed, I don't intend to alter the native screen resolution, though I'm aware this requires a ResEdit modification all the same. Just wondering if the Mystic CC is known to be associated with any major bugs or decreased longevity of the unit. Some problems with the mod have indeed been posted, so just wanted to pick your guys' and anyone else's brains before proceeding. Uniserver, you might just get another logic board to recap in the process.